When fingerprinting is disabled and the user tries to use scan, Picard asks the user if they want to open the options to configure fingerprinting. After the user has enabled fingerprinting Picard is supposed to perform the action.

This broke in PICARD-1571 (https://github.com/metabrainz/picard/commit/f8eb75596e8090d2f08e9290608dbe7a9f4964d4), as this no longer uses exec to run the dialog and thus the code is no longer blocking.